/*
 * Copyright (C) 2009,2010 University of Paderborn, Computer Networks Group
 * Copyright (C) 2009,2010 Christian Dannewitz <christian.dannewitz@upb.de>
 * Copyright (C) 2009,2010 Thorsten Biermann <thorsten.biermann@upb.de>
 * 
 * Copyright (C) 2009,2010 Eduard Bauer <edebauer@mail.upb.de>
 * Copyright (C) 2009,2010 Matthias Becker <matzeb@mail.upb.de>
 * Copyright (C) 2009,2010 Frederic Beister <azamir@zitmail.uni-paderborn.de>
 * Copyright (C) 2009,2010 Nadine Dertmann <ndertmann@gmx.de>
 * Copyright (C) 2009,2010 Michael Kionka <mkionka@mail.upb.de>
 * Copyright (C) 2009,2010 Mario Mohr <mmohr@mail.upb.de>
 * Copyright (C) 2009,2010 Felix Steffen <felix.steffen@gmx.de>
 * Copyright (C) 2009,2010 Sebastian Stey <sebstey@mail.upb.de>
 * Copyright (C) 2009,2010 Steffen Weber <stwe@mail.upb.de>
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the University of Paderborn nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package netinf.common.datamodel.impl;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import netinf.common.datamodel.DatamodelFactory;
import netinf.common.datamodel.NetInfObjectWrapper;

import org.apache.log4j.Logger;

/**
 * The superclass of all impl-implementations of the datamodel classes. Instances of this class are not allowed to be created.
 * 
 * @author PG Augnet 2, University of Paderborn
 */
public abstract class NetInfObjectWrapperImpl implements Serializable, NetInfObjectWrapper {

   private static final Logger LOG = Logger.getLogger(NetInfObjectWrapperImpl.class);

   private static final long serialVersionUID = -5313272919865756604L;

   // Should not be serialized. Is accordingly missing after the serialization.
   protected transient DatamodelFactoryImpl datamodelFactory;

   public NetInfObjectWrapperImpl(DatamodelFactoryImpl datamodelFactory) {
      this.datamodelFactory = datamodelFactory;
   }

   /**
    * In this case, we do not wrap any object. We simply return ourselves.
    * 
    * @see netinf.common.datamodel.NetInfObjectWrapper#getWrappedObject()
    */
   @Override
   public Object getWrappedObject() {
      return this;
   }

   @Override
   public byte[] serializeToBytes() {
      LOG.trace(null);

      byte[] result = null;

      ByteArrayOutputStream byteArrayOutputStream = null;
      ObjectOutputStream oos = null;
      try {

         byteArrayOutputStream = new ByteArrayOutputStream();
         oos = new ObjectOutputStream(byteArrayOutputStream);
         oos.writeObject(this);

         result = byteArrayOutputStream.toByteArray();
         LOG.trace("Succesfully serialized information object");

      } catch (IOException e) {
         LOG.error("Could not serialize information object", e);
      } finally {
         if (oos != null) {
            try {
               oos.close();
            } catch (IOException e) {
               LOG.error("Could not close output stream", e);
            }
         }

         if (byteArrayOutputStream != null) {
            try {
               byteArrayOutputStream.close();
            } catch (IOException e) {
               LOG.error("Could not close output stream", e);
            }
         }
      }

      return result;
   }

   @Override
   public Object clone() {
      return datamodelFactory.copyObject(this);
   }

   @Override
   public DatamodelFactory getDatamodelFactory() {
      return datamodelFactory;
   }

   /**
    * Internal Method of the impl implementation of the datamodel.
    */
   public void setDatamodelFactory(DatamodelFactoryImpl newDatamodelFactory) {
      datamodelFactory = newDatamodelFactory;
   }
}
